./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.paper_v3.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.paper_v3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1a93b4c325da61bdb0bcf5f7bfce47877e5238073f7401e4883b579f193ca117 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:02:38,661 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:02:38,779 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-25 00:02:38,787 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:02:38,788 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:02:38,833 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:02:38,835 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:02:38,836 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:02:38,837 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:02:38,844 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:02:38,845 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:02:38,845 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:02:38,846 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:02:38,848 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:02:38,848 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:02:38,849 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:02:38,849 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:02:38,850 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:02:38,850 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:02:38,850 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:02:38,851 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:02:38,852 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:02:38,853 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:02:38,870 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:02:38,871 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:02:38,872 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:02:38,872 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:02:38,873 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:02:38,873 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:02:38,873 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:02:38,875 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:02:38,875 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:02:38,876 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:02:38,876 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:02:38,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:02:38,877 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:02:38,877 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:02:38,878 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:02:38,878 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:02:38,879 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:02:38,879 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:02:38,879 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:02:38,880 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:02:38,880 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:02:38,881 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a93b4c325da61bdb0bcf5f7bfce47877e5238073f7401e4883b579f193ca117 [2023-11-25 00:02:39,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:02:39,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:02:39,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:02:39,187 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:02:39,189 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:02:39,191 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.paper_v3.c [2023-11-25 00:02:42,332 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:02:42,563 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:02:42,564 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.paper_v3.c [2023-11-25 00:02:42,573 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/data/0d54e71d6/1f7aad5f7d554af49b044fb311d77a32/FLAGcaaf999fb [2023-11-25 00:02:42,589 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/data/0d54e71d6/1f7aad5f7d554af49b044fb311d77a32 [2023-11-25 00:02:42,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:02:42,593 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:02:42,595 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:02:42,595 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:02:42,601 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:02:42,602 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:02:42" (1/1) ... [2023-11-25 00:02:42,603 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1926ca15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:42, skipping insertion in model container [2023-11-25 00:02:42,604 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:02:42" (1/1) ... [2023-11-25 00:02:42,638 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:02:42,845 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.paper_v3.c[1248,1261] [2023-11-25 00:02:42,933 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:02:42,949 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:02:42,963 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.paper_v3.c[1248,1261] [2023-11-25 00:02:43,015 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:02:43,033 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:02:43,034 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:43 WrapperNode [2023-11-25 00:02:43,034 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:02:43,035 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:02:43,036 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:02:43,036 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:02:43,044 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:43" (1/1) ... [2023-11-25 00:02:43,066 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:43" (1/1) ... [2023-11-25 00:02:43,133 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 210 [2023-11-25 00:02:43,134 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:02:43,134 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:02:43,135 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:02:43,135 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:02:43,145 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:43" (1/1) ... [2023-11-25 00:02:43,145 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:43" (1/1) ... [2023-11-25 00:02:43,163 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:43" (1/1) ... [2023-11-25 00:02:43,164 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:43" (1/1) ... [2023-11-25 00:02:43,194 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:43" (1/1) ... [2023-11-25 00:02:43,198 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:43" (1/1) ... [2023-11-25 00:02:43,201 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:43" (1/1) ... [2023-11-25 00:02:43,204 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:43" (1/1) ... [2023-11-25 00:02:43,221 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:02:43,222 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:02:43,223 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:02:43,223 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:02:43,224 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:43" (1/1) ... [2023-11-25 00:02:43,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:02:43,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:43,264 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:02:43,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:02:43,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:02:43,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:02:43,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:02:43,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:02:43,398 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:02:43,401 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:02:43,844 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:02:44,135 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:02:44,135 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-25 00:02:44,137 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:02:44 BoogieIcfgContainer [2023-11-25 00:02:44,137 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:02:44,141 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:02:44,141 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:02:44,144 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:02:44,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:02:42" (1/3) ... [2023-11-25 00:02:44,145 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb00f95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:02:44, skipping insertion in model container [2023-11-25 00:02:44,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:43" (2/3) ... [2023-11-25 00:02:44,147 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb00f95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:02:44, skipping insertion in model container [2023-11-25 00:02:44,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:02:44" (3/3) ... [2023-11-25 00:02:44,150 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.paper_v3.c [2023-11-25 00:02:44,171 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:02:44,171 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:02:44,223 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:02:44,230 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5d87972f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:02:44,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:02:44,235 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:02:44,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-25 00:02:44,249 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:44,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-25 00:02:44,250 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:44,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:44,256 INFO L85 PathProgramCache]: Analyzing trace with hash 7002839, now seen corresponding path program 1 times [2023-11-25 00:02:44,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:44,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106990113] [2023-11-25 00:02:44,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:44,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:45,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:45,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106990113] [2023-11-25 00:02:45,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106990113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:45,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:45,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:02:45,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954083404] [2023-11-25 00:02:45,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:45,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:02:45,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:45,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:02:45,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:02:45,384 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:02:45,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:45,521 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2023-11-25 00:02:45,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:02:45,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-25 00:02:45,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:45,532 INFO L225 Difference]: With dead ends: 15 [2023-11-25 00:02:45,532 INFO L226 Difference]: Without dead ends: 9 [2023-11-25 00:02:45,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:02:45,542 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:45,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:02:45,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-11-25 00:02:45,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2023-11-25 00:02:45,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:02:45,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2023-11-25 00:02:45,576 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2023-11-25 00:02:45,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:45,577 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2023-11-25 00:02:45,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:02:45,578 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2023-11-25 00:02:45,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-25 00:02:45,579 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:45,579 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-25 00:02:45,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:02:45,580 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:45,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:45,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1822851810, now seen corresponding path program 1 times [2023-11-25 00:02:45,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:45,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349231406] [2023-11-25 00:02:45,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:45,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-25 00:02:45,976 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-25 00:02:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-25 00:02:46,468 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-25 00:02:46,469 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-25 00:02:46,471 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-25 00:02:46,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:02:46,477 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-25 00:02:46,482 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-25 00:02:46,526 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-11-25 00:02:46,526 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2023-11-25 00:02:46,546 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 12:02:46 BoogieIcfgContainer [2023-11-25 00:02:46,547 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-25 00:02:46,548 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-25 00:02:46,548 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-25 00:02:46,548 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-25 00:02:46,549 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:02:44" (3/4) ... [2023-11-25 00:02:46,551 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-25 00:02:46,552 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-25 00:02:46,553 INFO L158 Benchmark]: Toolchain (without parser) took 3959.97ms. Allocated memory was 121.6MB in the beginning and 174.1MB in the end (delta: 52.4MB). Free memory was 77.6MB in the beginning and 126.7MB in the end (delta: -49.1MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2023-11-25 00:02:46,555 INFO L158 Benchmark]: CDTParser took 1.42ms. Allocated memory is still 121.6MB. Free memory is still 91.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-25 00:02:46,558 INFO L158 Benchmark]: CACSL2BoogieTranslator took 439.35ms. Allocated memory is still 121.6MB. Free memory was 77.5MB in the beginning and 64.6MB in the end (delta: 13.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-25 00:02:46,559 INFO L158 Benchmark]: Boogie Procedure Inliner took 98.47ms. Allocated memory is still 121.6MB. Free memory was 64.2MB in the beginning and 59.2MB in the end (delta: 5.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-25 00:02:46,562 INFO L158 Benchmark]: Boogie Preprocessor took 87.18ms. Allocated memory is still 121.6MB. Free memory was 59.2MB in the beginning and 57.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-25 00:02:46,563 INFO L158 Benchmark]: RCFGBuilder took 914.90ms. Allocated memory was 121.6MB in the beginning and 174.1MB in the end (delta: 52.4MB). Free memory was 57.0MB in the beginning and 89.6MB in the end (delta: -32.5MB). Peak memory consumption was 27.0MB. Max. memory is 16.1GB. [2023-11-25 00:02:46,563 INFO L158 Benchmark]: TraceAbstraction took 2406.45ms. Allocated memory is still 174.1MB. Free memory was 88.7MB in the beginning and 127.8MB in the end (delta: -39.1MB). Peak memory consumption was 45.1MB. Max. memory is 16.1GB. [2023-11-25 00:02:46,564 INFO L158 Benchmark]: Witness Printer took 5.03ms. Allocated memory is still 174.1MB. Free memory was 127.8MB in the beginning and 126.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-25 00:02:46,571 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.42ms. Allocated memory is still 121.6MB. Free memory is still 91.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 439.35ms. Allocated memory is still 121.6MB. Free memory was 77.5MB in the beginning and 64.6MB in the end (delta: 13.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 98.47ms. Allocated memory is still 121.6MB. Free memory was 64.2MB in the beginning and 59.2MB in the end (delta: 5.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 87.18ms. Allocated memory is still 121.6MB. Free memory was 59.2MB in the beginning and 57.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 914.90ms. Allocated memory was 121.6MB in the beginning and 174.1MB in the end (delta: 52.4MB). Free memory was 57.0MB in the beginning and 89.6MB in the end (delta: -32.5MB). Peak memory consumption was 27.0MB. Max. memory is 16.1GB. * TraceAbstraction took 2406.45ms. Allocated memory is still 174.1MB. Free memory was 88.7MB in the beginning and 127.8MB in the end (delta: -39.1MB). Peak memory consumption was 45.1MB. Max. memory is 16.1GB. * Witness Printer took 5.03ms. Allocated memory is still 174.1MB. Free memory was 127.8MB in the beginning and 126.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 21]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 79, overapproximation of bitwiseAnd at line 60. Possible FailurePath: [L26] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L27] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L29] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 8); [L30] const SORT_3 msb_SORT_3 = (SORT_3)1 << (8 - 1); [L32] const SORT_3 var_4 = 0; [L33] const SORT_1 var_13 = 1; [L34] const SORT_3 var_19 = 255; [L35] const SORT_3 var_23 = 1; [L37] SORT_1 input_2; [L39] EXPR __VERIFIER_nondet_uchar() & mask_SORT_3 [L39] SORT_3 state_5 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L40] EXPR __VERIFIER_nondet_uchar() & mask_SORT_3 [L40] SORT_3 state_7 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L42] SORT_3 init_6_arg_1 = var_4; [L43] state_5 = init_6_arg_1 [L44] SORT_3 init_8_arg_1 = var_4; [L45] state_7 = init_8_arg_1 VAL [init_6_arg_1=0, init_8_arg_1=0, mask_SORT_1=1, mask_SORT_3=255, msb_SORT_1=1, msb_SORT_3=128, state_5=0, state_7=0, var_13=1, var_19=255, var_23=1, var_4=0] [L48] input_2 = __VERIFIER_nondet_uchar() [L51] SORT_3 var_9_arg_0 = state_5; [L52] SORT_3 var_9_arg_1 = state_7; [L53] SORT_1 var_9 = var_9_arg_0 > var_9_arg_1; [L54] SORT_1 var_10_arg_0 = var_9; [L55] SORT_1 var_10 = ~var_10_arg_0; [L56] SORT_1 var_14_arg_0 = var_10; [L57] SORT_1 var_14 = ~var_14_arg_0; [L58] SORT_1 var_15_arg_0 = var_13; [L59] SORT_1 var_15_arg_1 = var_14; [L60] EXPR var_15_arg_0 & var_15_arg_1 [L60] SORT_1 var_15 = var_15_arg_0 & var_15_arg_1; [L61] EXPR var_15 & mask_SORT_1 [L61] var_15 = var_15 & mask_SORT_1 [L62] SORT_1 bad_16_arg_0 = var_15; [L63] CALL __VERIFIER_assert(!(bad_16_arg_0)) [L21] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L63] RET __VERIFIER_assert(!(bad_16_arg_0)) [L65] SORT_3 var_25_arg_0 = state_5; [L66] SORT_3 var_25_arg_1 = state_7; [L67] SORT_1 var_25 = var_25_arg_0 == var_25_arg_1; [L68] SORT_3 var_24_arg_0 = state_5; [L69] SORT_3 var_24_arg_1 = var_23; [L70] SORT_3 var_24 = var_24_arg_0 + var_24_arg_1; [L71] SORT_3 var_18_arg_0 = state_5; [L72] SORT_3 var_18_arg_1 = state_7; [L73] SORT_1 var_18 = var_18_arg_0 > var_18_arg_1; [L74] SORT_3 var_20_arg_0 = state_7; [L75] SORT_3 var_20_arg_1 = var_19; [L76] SORT_1 var_20 = var_20_arg_0 != var_20_arg_1; [L77] SORT_1 var_21_arg_0 = var_18; [L78] SORT_1 var_21_arg_1 = var_20; [L79] EXPR var_21_arg_0 | var_21_arg_1 [L79] SORT_1 var_21 = var_21_arg_0 | var_21_arg_1; [L80] EXPR var_21 & mask_SORT_1 [L80] var_21 = var_21 & mask_SORT_1 [L81] SORT_1 var_22_arg_0 = var_21; [L82] SORT_3 var_22_arg_1 = state_5; [L83] SORT_3 var_22_arg_2 = state_7; [L84] SORT_3 var_22 = var_22_arg_0 ? var_22_arg_1 : var_22_arg_2; [L85] SORT_1 var_26_arg_0 = var_25; [L86] SORT_3 var_26_arg_1 = var_24; [L87] SORT_3 var_26_arg_2 = var_22; [L88] SORT_3 var_26 = var_26_arg_0 ? var_26_arg_1 : var_26_arg_2; [L89] EXPR var_26 & mask_SORT_3 [L89] var_26 = var_26 & mask_SORT_3 [L90] SORT_3 next_27_arg_1 = var_26; [L91] SORT_3 var_33_arg_0 = state_5; [L92] SORT_3 var_33_arg_1 = state_7; [L93] SORT_1 var_33 = var_33_arg_0 > var_33_arg_1; [L94] SORT_3 var_29_arg_0 = state_5; [L95] SORT_3 var_29_arg_1 = state_7; [L96] SORT_1 var_29 = var_29_arg_0 == var_29_arg_1; [L97] SORT_3 var_30_arg_0 = state_7; [L98] SORT_3 var_30_arg_1 = var_19; [L99] SORT_1 var_30 = var_30_arg_0 != var_30_arg_1; [L100] SORT_1 var_31_arg_0 = var_29; [L101] SORT_1 var_31_arg_1 = var_30; [L102] EXPR var_31_arg_0 | var_31_arg_1 [L102] SORT_1 var_31 = var_31_arg_0 | var_31_arg_1; [L103] EXPR var_31 & mask_SORT_1 [L103] var_31 = var_31 & mask_SORT_1 [L104] SORT_3 var_28_arg_0 = state_7; [L105] SORT_3 var_28_arg_1 = var_23; [L106] SORT_3 var_28 = var_28_arg_0 + var_28_arg_1; [L107] SORT_1 var_32_arg_0 = var_31; [L108] SORT_3 var_32_arg_1 = var_28; [L109] SORT_3 var_32_arg_2 = state_5; [L110] SORT_3 var_32 = var_32_arg_0 ? var_32_arg_1 : var_32_arg_2; [L111] SORT_1 var_34_arg_0 = var_33; [L112] SORT_3 var_34_arg_1 = state_7; [L113] SORT_3 var_34_arg_2 = var_32; [L114] SORT_3 var_34 = var_34_arg_0 ? var_34_arg_1 : var_34_arg_2; [L115] EXPR var_34 & mask_SORT_3 [L115] var_34 = var_34 & mask_SORT_3 [L116] SORT_3 next_35_arg_1 = var_34; [L118] state_5 = next_27_arg_1 [L119] state_7 = next_35_arg_1 VAL [bad_16_arg_0=0, init_6_arg_1=0, init_8_arg_1=0, mask_SORT_1=1, mask_SORT_3=255, msb_SORT_1=1, msb_SORT_3=128, next_27_arg_1=1, next_35_arg_1=0, state_5=1, state_7=0, var_10=255, var_10_arg_0=0, var_13=1, var_14=0, var_14_arg_0=255, var_15=0, var_15_arg_0=1, var_15_arg_1=0, var_18=0, var_18_arg_0=0, var_18_arg_1=0, var_19=255, var_20=1, var_20_arg_0=0, var_20_arg_1=255, var_21=1, var_21_arg_0=0, var_21_arg_1=1, var_22=0, var_22_arg_0=1, var_22_arg_1=0, var_22_arg_2=0, var_23=1, var_24=1, var_24_arg_0=0, var_24_arg_1=1, var_25=1, var_25_arg_0=0, var_25_arg_1=0, var_26=1, var_26_arg_0=1, var_26_arg_1=1, var_26_arg_2=0, var_28=1, var_28_arg_0=0, var_28_arg_1=1, var_29=1, var_29_arg_0=0, var_29_arg_1=0, var_30=1, var_30_arg_0=0, var_30_arg_1=255, var_31=1, var_31_arg_0=1, var_31_arg_1=1, var_32=1, var_32_arg_0=1, var_32_arg_1=1, var_32_arg_2=0, var_33=0, var_33_arg_0=0, var_33_arg_1=0, var_34=0, var_34_arg_0=0, var_34_arg_1=0, var_34_arg_2=1, var_4=0, var_9=0, var_9_arg_0=0, var_9_arg_1=0] [L48] input_2 = __VERIFIER_nondet_uchar() [L51] SORT_3 var_9_arg_0 = state_5; [L52] SORT_3 var_9_arg_1 = state_7; [L53] SORT_1 var_9 = var_9_arg_0 > var_9_arg_1; [L54] SORT_1 var_10_arg_0 = var_9; [L55] SORT_1 var_10 = ~var_10_arg_0; [L56] SORT_1 var_14_arg_0 = var_10; [L57] SORT_1 var_14 = ~var_14_arg_0; [L58] SORT_1 var_15_arg_0 = var_13; [L59] SORT_1 var_15_arg_1 = var_14; [L60] EXPR var_15_arg_0 & var_15_arg_1 [L60] SORT_1 var_15 = var_15_arg_0 & var_15_arg_1; [L61] EXPR var_15 & mask_SORT_1 [L61] var_15 = var_15 & mask_SORT_1 [L62] SORT_1 bad_16_arg_0 = var_15; [L63] CALL __VERIFIER_assert(!(bad_16_arg_0)) [L21] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L21] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.3s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3 mSDsluCounter, 6 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10 IncrementalHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 2 mSDtfsCounter, 10 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=1, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 8 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-25 00:02:46,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.paper_v3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1a93b4c325da61bdb0bcf5f7bfce47877e5238073f7401e4883b579f193ca117 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:02:49,296 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:02:49,438 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2023-11-25 00:02:49,447 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:02:49,449 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:02:49,483 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:02:49,486 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:02:49,487 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:02:49,488 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:02:49,494 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:02:49,494 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:02:49,495 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:02:49,495 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:02:49,497 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:02:49,497 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:02:49,498 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:02:49,499 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:02:49,499 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:02:49,500 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:02:49,500 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:02:49,501 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:02:49,501 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:02:49,502 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-25 00:02:49,502 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-25 00:02:49,503 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-25 00:02:49,503 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:02:49,504 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:02:49,504 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:02:49,505 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-25 00:02:49,505 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:02:49,507 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:02:49,507 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:02:49,507 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:02:49,508 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:02:49,508 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:02:49,508 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-25 00:02:49,509 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-25 00:02:49,509 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:02:49,509 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:02:49,510 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:02:49,511 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:02:49,511 INFO L153 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a93b4c325da61bdb0bcf5f7bfce47877e5238073f7401e4883b579f193ca117 [2023-11-25 00:02:49,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:02:49,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:02:49,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:02:49,912 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:02:49,913 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:02:49,914 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.paper_v3.c [2023-11-25 00:02:53,085 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:02:53,348 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:02:53,349 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.paper_v3.c [2023-11-25 00:02:53,359 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/data/c8e291988/d6ba8ffda8ce4289850c9114d28f99cc/FLAG7edef27d4 [2023-11-25 00:02:53,373 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/data/c8e291988/d6ba8ffda8ce4289850c9114d28f99cc [2023-11-25 00:02:53,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:02:53,377 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:02:53,379 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:02:53,379 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:02:53,384 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:02:53,385 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:02:53" (1/1) ... [2023-11-25 00:02:53,386 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d8e68c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:53, skipping insertion in model container [2023-11-25 00:02:53,386 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:02:53" (1/1) ... [2023-11-25 00:02:53,433 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:02:53,628 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.paper_v3.c[1248,1261] [2023-11-25 00:02:53,710 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:02:53,724 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:02:53,744 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.paper_v3.c[1248,1261] [2023-11-25 00:02:53,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:02:53,814 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:02:53,815 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:53 WrapperNode [2023-11-25 00:02:53,815 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:02:53,816 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:02:53,816 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:02:53,817 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:02:53,825 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:53" (1/1) ... [2023-11-25 00:02:53,856 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:53" (1/1) ... [2023-11-25 00:02:53,896 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 110 [2023-11-25 00:02:53,898 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:02:53,899 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:02:53,899 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:02:53,899 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:02:53,909 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:53" (1/1) ... [2023-11-25 00:02:53,909 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:53" (1/1) ... [2023-11-25 00:02:53,925 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:53" (1/1) ... [2023-11-25 00:02:53,925 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:53" (1/1) ... [2023-11-25 00:02:53,931 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:53" (1/1) ... [2023-11-25 00:02:53,934 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:53" (1/1) ... [2023-11-25 00:02:53,950 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:53" (1/1) ... [2023-11-25 00:02:53,952 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:53" (1/1) ... [2023-11-25 00:02:53,955 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:02:53,956 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:02:53,956 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:02:53,956 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:02:53,957 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:53" (1/1) ... [2023-11-25 00:02:53,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:02:53,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:54,002 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:02:54,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:02:54,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:02:54,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-25 00:02:54,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:02:54,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:02:54,189 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:02:54,191 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:02:54,474 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:02:54,508 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:02:54,508 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-25 00:02:54,509 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:02:54 BoogieIcfgContainer [2023-11-25 00:02:54,509 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:02:54,511 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:02:54,511 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:02:54,515 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:02:54,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:02:53" (1/3) ... [2023-11-25 00:02:54,516 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23808f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:02:54, skipping insertion in model container [2023-11-25 00:02:54,516 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:53" (2/3) ... [2023-11-25 00:02:54,516 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23808f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:02:54, skipping insertion in model container [2023-11-25 00:02:54,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:02:54" (3/3) ... [2023-11-25 00:02:54,518 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.paper_v3.c [2023-11-25 00:02:54,537 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:02:54,537 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:02:54,585 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:02:54,592 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@15174e10, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:02:54,593 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:02:54,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:02:54,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-25 00:02:54,604 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:54,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-25 00:02:54,608 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:54,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:54,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1827279, now seen corresponding path program 1 times [2023-11-25 00:02:54,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-25 00:02:54,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736748506] [2023-11-25 00:02:54,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:54,638 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-25 00:02:54,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-25 00:02:54,640 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-25 00:02:54,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-25 00:02:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:54,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-25 00:02:54,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:55,095 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:02:55,096 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-25 00:02:55,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736748506] [2023-11-25 00:02:55,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736748506] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:55,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:55,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:02:55,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129553040] [2023-11-25 00:02:55,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:55,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:02:55,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-25 00:02:55,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:02:55,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:02:55,150 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:02:55,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:55,217 INFO L93 Difference]: Finished difference Result 16 states and 24 transitions. [2023-11-25 00:02:55,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:02:55,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-25 00:02:55,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:55,227 INFO L225 Difference]: With dead ends: 16 [2023-11-25 00:02:55,227 INFO L226 Difference]: Without dead ends: 9 [2023-11-25 00:02:55,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:02:55,234 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:55,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:02:55,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-11-25 00:02:55,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2023-11-25 00:02:55,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:02:55,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2023-11-25 00:02:55,267 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2023-11-25 00:02:55,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:55,267 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2023-11-25 00:02:55,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:02:55,268 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2023-11-25 00:02:55,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-25 00:02:55,268 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:55,269 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-25 00:02:55,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-25 00:02:55,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-25 00:02:55,472 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:55,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:55,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1393329571, now seen corresponding path program 1 times [2023-11-25 00:02:55,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-25 00:02:55,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316168447] [2023-11-25 00:02:55,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:55,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-25 00:02:55,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-25 00:02:55,481 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-25 00:02:55,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-25 00:02:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:55,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-25 00:02:55,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:56,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:02:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:57,665 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-25 00:02:57,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316168447] [2023-11-25 00:02:57,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316168447] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:02:57,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1274527683] [2023-11-25 00:02:57,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:57,667 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-25 00:02:57,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/cvc4 [2023-11-25 00:02:57,669 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-25 00:02:57,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2023-11-25 00:02:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:57,856 WARN L260 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-25 00:02:57,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:58,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:03:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:00,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1274527683] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:03:00,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337882808] [2023-11-25 00:03:00,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:00,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:00,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:00,313 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:00,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:03:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:00,427 WARN L260 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-25 00:03:00,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:00,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:03:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:02,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337882808] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:03:02,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-25 00:03:02,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 11 [2023-11-25 00:03:02,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338436494] [2023-11-25 00:03:02,047 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-25 00:03:02,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-25 00:03:02,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-25 00:03:02,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-25 00:03:02,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:03:02,050 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:02,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:02,246 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2023-11-25 00:03:02,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-25 00:03:02,247 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-25 00:03:02,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:02,248 INFO L225 Difference]: With dead ends: 17 [2023-11-25 00:03:02,248 INFO L226 Difference]: Without dead ends: 15 [2023-11-25 00:03:02,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-11-25 00:03:02,250 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:02,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 13 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:03:02,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-25 00:03:02,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2023-11-25 00:03:02,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:02,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2023-11-25 00:03:02,257 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 7 [2023-11-25 00:03:02,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:02,257 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2023-11-25 00:03:02,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:02,258 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2023-11-25 00:03:02,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-25 00:03:02,259 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:02,259 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1] [2023-11-25 00:03:02,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2023-11-25 00:03:02,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:02,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:02,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:02,862 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:02,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:02,863 INFO L85 PathProgramCache]: Analyzing trace with hash -57678563, now seen corresponding path program 2 times [2023-11-25 00:03:02,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-25 00:03:02,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906735466] [2023-11-25 00:03:02,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-25 00:03:02,864 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-25 00:03:02,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-25 00:03:02,871 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-25 00:03:02,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-25 00:03:03,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-25 00:03:03,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:03:03,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 110 conjunts are in the unsatisfiable core [2023-11-25 00:03:03,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:04,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:03:24,670 WARN L293 SmtUtils]: Spent 5.59s on a formula simplification. DAG size of input: 525 DAG size of output: 454 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-25 00:03:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:32,127 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-25 00:03:32,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906735466] [2023-11-25 00:03:32,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906735466] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:03:32,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1477502225] [2023-11-25 00:03:32,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-25 00:03:32,129 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-25 00:03:32,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/cvc4 [2023-11-25 00:03:32,133 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-25 00:03:32,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7489ae-5ac2-4c3d-8895-c65e58df3d1b/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process